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<head>
  <title>MSE: Check that playback only starts once we have data at time = 0</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="text/javascript" src="mediasource.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<pre id="test">
<script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();

runWithMSE(function(ms, el) {
  el.controls = true;
  el.addEventListener("loadeddata", function() {
    ok(el.buffered.length > 0, "data is buffered");
    is(el.buffered.start(0), 0, "must fire loadeddata when data has been loaded");
    is(el.currentTime, 0, "must fire loadeddata at start");
  });
  el.addEventListener("playing", function() {
    ok(el.buffered.length > 0, "data is buffered");
    is(el.buffered.start(0), 0, "must fire playing when data has been loaded");
    ok(el.currentTime >= 0, "must have started playback");
  });
  once(ms, 'sourceopen').then(function() {
    ok(true, "Receive a sourceopen event");
    var videosb = ms.addSourceBuffer("video/mp4");
    is(el.readyState, el.HAVE_NOTHING, "readyState is HAVE_NOTHING");
    fetchAndLoad(videosb, 'bipbop/bipbop_video', ['init'], '.mp4')
    .then(once.bind(null, el, "loadedmetadata"))
    .then(function() {
      videosb.appendWindowStart = 2;
      videosb.appendWindowEnd = 4;
      is(el.readyState, el.HAVE_METADATA, "readyState is HAVE_METADATA");
      // Load [2.4, 3.968344). 2.4 as it's the first keyframe after 2s and
      // 3.968344 as the last frame ends after 4s.
      return fetchAndLoad(videosb, 'bipbop/bipbop_video', range(1, 8), '.m4s');
    })
    .then(function() {
      is(el.readyState, el.HAVE_METADATA, "readyState is HAVE_METADATA");
      // test that appendWindowEnd did its job.
      ok(el.buffered.start(0) >= 2, "no data can be found prior appendWindowStart");
      ok(el.buffered.end(el.buffered.length-1) <= 4, "no data can be found beyond appendWindowEnd");
      el.play();
      return once(el, "play");
    })
    .then(function() {
      videosb.appendWindowStart = 0;
      var promises = [];
      // Load [0, 3.971666).
      promises.push(fetchAndLoad(videosb, 'bipbop/bipbop_video', range(1, 8), '.m4s'));
      // playback can only start now.
      promises.push(once(el, "playing"));
      return Promise.all(promises);
    })
    .then(function() {
      ok(true, "playing");
      SimpleTest.finish();
    });
  });
});

</script>
</pre>
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